Automatic gas cut-off.



No. 672,990. Patented Apr. 30, |90l.- H. SHUEMAKER. vAUTOMATIC GAS CUT-OFF,

(Application led Feb. 15, 1901.)

(No Model.)

UNITED STATES HARRY SHOEMAKER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO GUSTAVE P. GEHRING, OF SAME PLACE.

AUTOMATIC GS CUT-*OFF-l SPECIFIGATION forming part of Letters Patent No. 672,990, dated April 30, 190.1.

Application tiled February 15 1901. Serial No. 47,486. (No model.)

To all whom, it may concern: a

Be it known that I, HARRY SHOEMAKER, a citizen of the United States, residingY at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Automatic Gas Cut-Offs,of which the following is a speciflcation.

My invention relates to improvements in automatic gas cut-offs; and the main object of my invention is the provision of a cut-off which is very simple, durable, and-inexpensive in construction as compared to similar devices in general use and which is operated by the hand to allow the gas to be admitted to the burner, and should the gas be blown out or go out the valve is closed automatically by` contraction of a wire or strip of metal, the whole device being connected to the burner-tube, so that it can be connected to any gas-xture.

Another object of my invention is the provision of anovel construction of valve and means for holding the same open and closing the same.

To attain the desired objects, my invention consists of an automatic gas out-off embodying novel features of construction and combination of parts, substantially as disclosed herein.

In the drawings, Figure l is a central sectional View of the entire valve and connections. Fig. 2 is a side elevation of the device. Fig. 3 is a bottom plan view thereof. Fig. 4 is a detail view of the spring.

Referring to the drawings, A is a burnertip mounted in the upper end of the tube B, which is connected to the short connectionpipe C, which is provided with the threaded end in order that the device can be attached to a gas-fixture. Fitting in the tapering openingor channel in the end of the pipe C, below the hollow of the tube B, is the valve D, provided with the channel E,which has the rightangled inlet-channel F, which is adapted to be turned so as to cause the pipe O to communicate with the tube and allow gas to ow to the burner-tip. This valve is mounted upon the stem G,which has mounted thereon, below the valve, the ring or plate H to hold the valve securely in place. The fiat coiled spring J, which is also mounted upon the stem below the plate, has its outer end connected to the post or pin K, while its inner end is connected rigidly to the stem, thus giving the stem a tension always toward the direction to close the valve. Mounted below the spring andalso upon the stem is the disk L, provided withl ratchet-teeth M, said disk having the pins N uponits under side to limit the movement of the releasing plate or arm O, mounted upon the stem and connected with the thumb-nut P and the lock-nut Q, this whole construction being held in the proper place by means of the nut-washer R, connected upon the top of the valve.

Formed integral with or secured upon the tube B, upon opposite sides thereof, are the long upwardly-extending arm S andthe short upwardly-extending arm T, this arm having pivoted thereto the lever U, provided with the short curved arm U' and the long straight arm U2. A piece ofwire or metal strip V is stretched from the top of arm S and the arm U and is adjusted to the proper tension by means of a thumb-nut W. The lower end of the long arm U2 engages the teeth of the ratchet-plate and is released from engagement by the releasing-plate.

From this description, taken in connection with the drawings, the operation of my improved automatic gas cut-o is readily understood and its numerous advantages fully appreciated; but, briefly stated, it is as follows: To secure a How of gas, it is simply necessaryto turn the valve by turning the thumb-nut. The gas is then ignited, and when the metal strip has expanded sufficiently one of the teeth of the ratchet-disk is caused to engage the lower end of the levers arm, and by means of the nut upon the strip a proper adjustment is attained after the strip has expanded to allow the strip to automatically pull upon the lever, when the flame is extinguished and the strip cooled. Should the dame be blown out or extinguished in any other way than by turning the valve off, the

wire or strip will shortly become cool, contracting sufficiently to cause the upper arm of the lever to be slightly drawn inward, moving the lower arm outward and disengaging it from connection with the tooth of the IOO ratchet-disk, the iat coiled spring then turning the valve-stem and closing the valve automatically. By reason of the lever being pivoted so high up and the straight arm being so long the slightest inward movement of the upper end of the lever will move the lower end twice as far. When it is desired to extinguish the dame, the thumb-nut is turned, and the releasing-disk abuts against the lower end of the lever and disengages it from connection with the tooth of the ratchet-disk and allows the spring to slowly assist in turning the valve or closing it.

It is evident that I provide a very simple, durable, and inexpensive automatic cut-o for gas-burners, which by reason of its compactness, its appearance, and its easy attachment to a fixture is very ecient and practical in use.

I claim- 1. In an automatic gas cut-olf, the combination with a connection-pipe, of a burnertube connected to said pipe, a tapering valve mounted in the burner-tube to control communication between the pipe and tube, a post connected to the under side of the pipe, a spring connected to said post and also to the valve, a toothed disk mounted upon the stem of the valve, a thumb-nut connected to said steni,a1'eleasingdisk connected to the thumbuut, a strip of metal supported above the burner, and means to hold the valve open when the strip of metal is expanded by engaging the toothed disk.

2. In an automatic gas cut-0E, the combination with a connecting-pipe, of a burner-V tube, a long and a short upwardly-extending arm upon opposite sides of the tube, a lever pivoted to the short arm and having its upper end in line withthe end of the long arm, a metal strip connected in the upper ends of said longarm and lever and suspended above the burner-tube, a valve controlling communication between the pipe and tube, .a spring connected to the valves stem to hold the valve closed, a toothed disk mounted upon the stem to be engaged by the lower end of the lever to hold the valve open, a releasing-disk counected with the stem below the tooth-disk, and a thumb-nut connected with the stem.

In testimony whereof I ax my signature in presence of two witnesses.

HARRY SHOEMAKER.

Witnesses:

R. LEAMAN, JOSEPH S. HAGAN. 

